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. 2013 Sep 22;31(6):1466–1475. doi: 10.1007/s10637-013-0031-z

Fig. 8.

Fig. 8

Proposed mechanism of action for Etoposide and LTUSI54. LTUSI54 appears to promote the MK2 dependent (p53 independent) pathway of cell cycle arrest over p53 dependent mechanisms. As MK2 is phosphorylated, it phosphorylates HDM2, which destabilises p53, inhibiting the p53 mediated apoptosis pathways